Question

1. 8/15 : 20/21 ; 39/43 : 13/43 ; 21/22 : 7/18 ; 44/45 : 11/18 помогите пожалуйста!!!

Answer 1

8/15 : 20/21=14/25
39/43 :13/43=3
21/22 : 7/18=2 5/11
44/45 :11/18=1 3/5

Answer 2

$1)frac{8}{15} div frac{20}{21} = frac{8}{15} times frac{21}{20} = frac{8 times 21}{15 times 20} = frac{2 times 7}{5 times 5} = frac{14}{25}$

$2)frac{39}{43} div frac{13}{43} = frac{39}{43} times frac{43}{13} = frac{39 times 43}{43 times 13} = frac{3 times 1}{1 times 1} = 3$

3)$frac{21}{22} div frac{7}{18} = frac{21}{22} times frac{18}{7} = frac{21 times 18}{22 times 7} = frac{3 times 9}{11 times 1} = frac{27}{11} = 2 frac{5}{11}$

4)$frac{44}{45} div frac{11}{18} = frac{44}{45} times frac{18}{11} = frac{44 times 18}{45 times 11} = frac{4 times 2}{5 times 1} = frac{8}{5} = 1 frac{3}{5}$